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单选题Which of the following is true about the immunity to HIV?A It is partly resistance to the mutation.B More Europeans have it than the people on other continents.C It is the result of outbreaks of the plague.D It is a mutation that protects white blood c

题目
单选题
Which of the following is true about the immunity to HIV?
A

It is partly resistance to the mutation.

B

More Europeans have it than the people on other continents.

C

It is the result of outbreaks of the plague.

D

It is a mutation that protects white blood cells.

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相似问题和答案

第1题：

which of the following statements is not true about maori population?

A. Maori population makes up nearly one-seventh of New Zealand s total population.

B. Maori population is younger than the total population.

C. Non-Maori women tend to have children earlier than Maori women.

D. Maori women tend to have more children than non-Maori women.


参考答案：C

第2题：

Passage Four
Ideasabout polite behaviour differ from one culture to another.Some societies,such asAmerica and Australia,for example,are mobile and veryopen.People here change jobs and move house quiteoften.As a m result,they have a lot of relationships that often last only mashort time,and they need to get to know people quickly.So it′s normal to havefriendly conversations with people that they have just met,and you can talk aboutthings that other cultures would regard as personal.
On the other hand,there are more crowded and less mobile societies where long-termrelationships are more important.A Malaysian or Mexican business person,for example,willwant to get to know you very well before he or she feels happy to startbusiness.But when you do get to know each other,the relationship becomes muchdeeper than it would in a mobile society.
To Americans,both Europeans and Asians seem cool and formal atfirst.On the other hand,as a passenger from a less mobile society puts it,it′s no fun spending several hours next to a stranger who wants to tell you allabout his or her life and asks you all sorts of questions that you don′t want to answer.
Cross-cultural differences aren′t just a problem for travelers,but also for people in daily life.Some societies have"universalist′′cultures.These societies strongly respect rules,and they treat every personand situation in basically the same way."Particularist"(强调特性的)societies also have rules,but they are less important than thesociety′s unwritten ideas about what is right or wrong for a particularsituation or a particular person.So the normal rules are changed to fit theneeds of the situation or the importance of the person.

Which of the following is true aboutthe rules in"particularist"societies?

A.They change to fit differentsituations.
B.People respect and obey themcompletely.
C.They don't exist.
D.No one obeys them.

答案：A
解析：

第3题：

Which of the following is TRUE about the family Katy is living with?

A. They are friendly. B. There are three people in their house.

C. They are strange. D. They have never taken Katy to the parties.


正确答案：A

第4题：

单选题
Which of the following is TRUE about the book?
A

It is the first world encyclopedic dictionary

B

It can help deaf people know about the world more easily

C

It took them sixteen years to finish the book

D

It includes medicine and art about the life of deaf people


正确答案： A
解析：
原文中第三段说这本书是“the first Chinese encyclopedic dictionary”，并不是世界范围内的。故A错误。原文中第四段提到“They spent six years”，也就是说这本书历时六年完成，并不是十六年，故C项错误。原文中第四段说“The dictionary includes words on medicine, education, psychology, law, history and culture about deaf people’s life.”，故D项不全面，应排除。故B项为正确选项。

第5题：

Which of the following statements about a Sales Catalog is TRUE？（）

  • A、A store can only have one sales catalog.
  • B、A sales catalog is used to bundle similar products.
  • C、A sales catalog may be used to place a product in more than one category.
  • D、Every store must have a sales catalog.

正确答案:C

第6题：

Of the existing theories about the origin of carnival ，people are not sure which theory is more true to the fact.()


正确答案：对

第7题：

Which statement is true about the comparison of voice traffic with video traffic？（）

  • A、 Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
  • B、 Latency requirements are less stringent for video traffic than for voice traffic.
  • C、 Video traffic is less sensitive to dropped packets than for voice traffic.
  • D、 Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP.
  • E、 Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
  • F、 Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP.

正确答案:A

第8题：

Which of the following is NOT true_________?

A． People may have more healthful food at McDonald's.

B． Scientists can control levels and types of substances to grow meat in labs.

C． Lab meat is less likely to be polluted like other kinds of meat.

D． It will not be long before lab meat is available in supermarkets.


正确答案：D
细节题。四个选项所涉及内容在文章第二段都有提及，根据原文，只有选项D(It will not be long before lab meat is available in supermarket．)与原文“The technology has a long way to go before meat could hit supermarkets．”不符，因此选项D为正确答案。

第9题：

Which statement is true about the comparison of voice traffic with video traffic？（）

  • A、video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows
  • B、latency requirements are less stringent for video traffic than for voice traffic
  • C、video traffic is less sensitive to dropped packets than for voice traffic
  • D、video traffic requires the retransmission capabilities of TCP whereas voice uses UDP
  • E、video traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows
  • F、voice traffic requires the retransmission capabilities of TCP whereas video uses UDP

正确答案:B,D

第10题：

单选题
Which of the following statements is true about Japan?
A

It has a very short life-expectancy on average.

B

It has the lowest infant mortality rate in the world.

C

Young people want to have more children.

D

The number of young people fit for work is decreasing.


正确答案： D
解析：
从录音中提到的“a diminishing workforce paying for a rising number of pensioners”，可知日本的劳动力变得越来越少。diminishing逐渐减少的；衰减的。pensioner领养老金者；领取抚恤金者。
【录音原文】
Japan has the highest life-expectancy in the world, one of the lowest birth rates and accepts few immigrants, leaving a diminishing workforce paying for a rising number of pensioners.

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